2019 Opus Bike Spark 4

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Disc brake
Average stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Average stack and reachvs category
Somewhat upright stack and reachvs category

Geometry

XXS
XS
S
M
L
XL
Stack
533mm
550mm
565mm
582mm
598mm
617mm
Reach
362mm
363mm
370mm
377mm
385mm
390mm
Stack to Reach Ratio
1.47:1
1.52:1
1.53:1
1.54:1
1.55:1
1.58:1
Seat Tube Length, Unknown
470mm
500mm
520mm
540mm
560mm
580mm
Top Tube Length, Effective/Horizontal Unknown
510mm
520mm
537mm
555mm
573mm
590mm
Top Tube Slope
9.3deg
7.9deg
7.3deg
7deg
6.6deg
6.6deg
Head Tube Angle
70.5deg
71deg
71.5deg
72deg
72.5deg
72.5deg
Seat Tube Angle
74.5deg
74deg
73.5deg
73deg
72.5deg
72deg
Head Tube Length
114mm
129mm
144mm
159mm
174mm
194mm
Bottom Bracket Drop
68mm
68mm
68mm
68mm
68mm
68mm
Bottom Bracket Height
276mm
276mm
276mm
276mm
276mm
276mm
Chainstay Length
435mm
435mm
435mm
435mm
435mm
435mm
Chainstay Length Horizontal
429.7mm
429.7mm
429.7mm
429.7mm
429.7mm
429.7mm
Trail
Mechanical Trail
Wheel Flop
Standover Height
772mm
792mm
811mm
830mm
848mm
869mm
Pedal Spindle to Ground Clearance
111mm
165 mm cranks
106mm
170 mm cranks
106mm
170 mm cranks
101mm
175 mm cranks
101mm
175 mm cranks
101mm
175 mm cranks

4 Build

XXS
XS
S
M
L
XL
Wheel Size
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
Tire Width
33mm
33mm
33mm
33mm
33mm
33mm
Tire Outer Diameter
688mm
688mm
688mm
688mm
688mm
688mm
Crank Length
165mm
170mm
170mm
175mm
175mm
175mm
Handlebar Width
380mm
400mm
420mm
420mm
440mm
460mm
Stem Length
80mm
90mm
100mm
100mm
110mm
110mm

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
All-road/Gravel
Source:https://www.opusbike.com/en/product/adventure/169-spark-4.html?CouleurId=163